package com.itheima.mapper;

import com.itheima.domain.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;

@Mapper
public interface DeptMapper {
    // 方式一:通过@Results注解手动映射结果集
   /* @Results({
            @Result(column = "create_time",property = "createTime"),
            @Result(column = "update_time",property = "updateTime")
    })
    @Select("select id, name, create_time, update_time from dept order by update_time desc ")
    List<Dept> selectAll();*/

    // 方式二:sql起别名
    /*@Select("select id, name, create_time createTime, update_time updateTime from dept order by update_time desc ")
    List<Dept> selectAll();*/

    // 方式三: 开启驼峰命名映射的开关[推荐]
    @Select("select id, name, create_time, update_time from dept order by update_time desc ")
    List<Dept> selectAll();

    @Delete("delete from dept where id = #{id}")
    void deleteById(Integer id);

    @Insert("insert into dept(name,create_time,update_time) values (#{name},#{createTime},#{updateTime})")
    void insert(Dept dept);

    @Select("select id, name, create_time, update_time from dept where id = #{id}")
    Dept selectById(Integer id);

    @Update("update dept set name = #{name},update_time = #{updateTime} where id = #{id}")
    void updateById(Dept dept);
}
